Stop for twister-bobbins.



Elm 848.012.

u l-M152 o-oco Mal g PATENTED MAR. 26, 1907.

APPLICATION FILED MAR. 16, 1906.

O The rear end is weighted and the front end OF NEW JERSEY.

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RICHARD H. COOK, OF FALL RIVER, MASSACHUSETTS, ASSIGNOR TO THE AMERICAN THREAD COMPANY, OF NEW YORK, N. Y., A CORPORATION STOP FOR TWISTER-BOBBINS.

No. 848l012.

ratented liiarch 26, 1907.

Application filed March 15, 1906. Serial No. 306,096.

To all whom it may concern:

Be it known that I, RronAnD H. Coon, a citizen of the United States, residing at Fall River, county of Bristol, Massachusetts, have invented certain new and useful Improvements in Stops for Twister-Bobbins, of which the following is a full, clear, and eXact description.

My invention relates to im rovements in textile machinery, and particu arly for twisting-machines.

The object of the invention is to provide a simple and reliable mechanism for stopping a bobbin when the yarn or thread breaks during the winding operation. In such machines the bobbins are placed in parallel rows and the strands which are to be twisted are fed through a suitable guide to the windingbobbin, so that the strands are twisted as desired. In case the strands of the thread break the loose end is likely to flip through the guide, take up dirt, &c., and smear it on the adjacent bobbins, as well as on the bobbin on which the thread is being wound. The result is the destruction of a considerable amount of thread, resulting in loss of material and time necessary for unwinding the thread.

My invention consists in improvements for promptly stopping the movement of the winding-bobbin in case the thread breaks.

The accompanying single sheet of drawings illustrates the principle of the invention, which will be readily understood by one acquainted with the art.

Figure 1 is a side view of mechanism embodying my invention for cooperating with a single bobbin. Fig. 2 is a front view of a detail of construction. Fig. 3 is a rear view of another detail. Fig. 4 is a plan view of another detail.

1 indicates the spindle, revolved by suitable means, as is customary, and carrying the bobbin 2.

3 and 4 indicate the customary guides in twisting-machines. The strands which are to be twisted are fed around the guide-roll 3 through the guide 4 onto the bobbin 2.

5 is a lever pivoted to the frame, preferably formed in two parts hinged together at 6.

forked, so that it stands underneath .the lower end of the bobbin. The front end may, however, be lifted up and thrown back, tilting it on its hinge.

7 is a dog which is weighted at its front end, having its rear end engaging a notch in the lever 5, so as to hold its front end depressed out of engagement with the bobbin.

8 is a pivoted arm, having an eye or passage at its outer end for the thread.

9 is a vertical rod, normally supported by the pivoted latch 10 and having two stop members 11 and 12 near its lower end.

13 is a catch pivoted to the lever 55, adapted to engage beneath the lower endof the bobbin when the front end of the lever 5 is raised, the movement being occasioned by the catch 13, having the link 14 ivoted at one end intermediate the length 0 13 and at the other end to the frame.

15 indicates the driving-pin on the spindle.

16 indicates a projecting portion of the rod 9, serving as a handle. I

The arm 8 is normally held in the position shown in Fig. 1. by the tension of the thread. If the thread breaks, the arm 8 is released and strikes against the latch 10. This releases the rod 9, which causes stop 11 to strike against the dog 7 and releases the lever 5, so that its front end is brought up beneath the bobbin. The bobbin is thus lifted clear from its driving engagement with the spindle and held stationary by the forked arms and the catch-lever 13. The end of the thread is again passed through the eye of the arm 8 before the thread is repaired. The rod 9 is then lifted and caught by the latch 10. In lifting the rod 9 the dog '7 is raised, which in turn raises the rear end of the lever 5, so as to drop the bobbin onto the spindle and per mit it to again take up its winding rotatlon.

The parts are simple in construction, readily installed, and efiicient in operation. The arm 8 being light in weightfo'=.= instance, formed of a light copper wirecauses but little tension on the thread. The momentum of the arm when it is released and swings on its pivot becomes sufiicient by the time it strikes the latch 10 to disengage the latch from the rod 9. The weight of the rod 9 and its attachments being considerable, sufiicient momentum is attained by the time the stop 11 strikes the dog 7 to readily disengage it from the lever 5. The overweighting of the lever 5 at its rear end causes a quick movement, so that the bobbin 2 is immediately disengaged from the driving-spindle. These parts may be very readily installed and in the ordinary twisting-111achine and without great expense and operated with very slight charges for maintenance.

The mechanism for disengaging the bobbin from the driving-spindle is normally in such a position as to in no way interfere with the operation of the machine. The memher which controls the operation or sets in operation the disengaging mechanism is so constructed and mounted that it places but little tension upon the yarn or thread which is being twisted and wound. The attachment, therefore, has practically no effect upon the yarn. It is possible to attain these advantages because the operating member is normally disconnected or free from the bobbin-disengaging mechanism. This is of particular importance where the yarn which is being Wound is very fine and light.

W hat I claim is- 1. In a twisting-machine, a winding-bobbin, a driving-spindle therefor, means on the spindle engaging the bobbin, a lever for disengaging the bobbin irom the driving-spindle, a catch pivoted upon said lever adapted to engage said bobbin; a dog normally holding said lever, a rod for disengaging said dog, a latch normally sustaining said rod, and a swinging arm having a passage for the yarn or thread, said arm being adapted to disengage said latch from said rod when the yarn or thread breaks and a link connected to said catch for causing it to be thrown into position when said lever disengages the bobbin.

2. In a twisting-machine, a twisting-spindle, a bobbin, means on the spindle engaging the bobbin, a lever for disengaging the bobbin from the spindle, a catch pivoted upon said lever adapted to engage said bobbin: a dog normally sustaining the lever, means for forcibly st: iking said dog to disengage it From said lever, a swinging arm having a passage for the thread or yarn, and means set in operation by the movement thereof for releasing said striking means and a link eonimcted to said. catch for causing it to be thrown into position when said lever disengages the bobbin.

3. In a stop-motion for a bobbin, :1 bobbin, a driving-spindle adapted to carry a bohbin, means on the spindle engaging the bobbin means for disengaging the bobbin Mom said spindle, a catch pivoted upon said lever adapted to engage said bobbin; a swinging arm having a passage for the thread or yarn, and means set in operation by the movement thereof for bringing said disengaging means into operation when the yarn or thread breaks and a link connected to said eateh l'oi' causing it to be thrown into position when said lever disengages the bobbin.

4. Ina stop-motion tor a bobbin, abobbin, a driving-spindle, means on the spindle engaging the bobbin, a pivoted lever having one end adapted to engage said bobbin having it opposite end oveiweighted, means l'oi' normally l'iolding said lever disengaged from said bobbin, a catch-lever pivoted to said engaging lever also adapted to engage said bobbin, a link connected to said catch-lever l'oicansingit tobe thrown into positionwhen said engaging lever operates, and means (or :el asing said engaging lever when the thread breaks.

RICHARD 11.. (YOUR. lVitnesses GEORGE I. GILMORE, ARTHUR ANnEnToN. 

